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1 //===- lib/MC/MCSectionWasm.cpp - Wasm Code Section Representation --------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "llvm/MC/MCSectionWasm.h"
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11 #include "llvm/MC/MCAsmInfo.h"
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12 #include "llvm/MC/MCContext.h"
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13 #include "llvm/MC/MCExpr.h"
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14 #include "llvm/MC/MCSymbol.h"
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15 #include "llvm/Support/raw_ostream.h"
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16
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17 using namespace llvm;
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18
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19 MCSectionWasm::~MCSectionWasm() {} // anchor.
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20
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21 // Decides whether a '.section' directive
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22 // should be printed before the section name.
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23 bool MCSectionWasm::ShouldOmitSectionDirective(StringRef Name,
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24 const MCAsmInfo &MAI) const {
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25 return MAI.shouldOmitSectionDirective(Name);
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26 }
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27
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28 static void printName(raw_ostream &OS, StringRef Name) {
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29 if (Name.find_first_not_of("0123456789_."
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30 "abcdefghijklmnopqrstuvwxyz"
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31 "ABCDEFGHIJKLMNOPQRSTUVWXYZ") == Name.npos) {
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32 OS << Name;
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33 return;
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34 }
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35 OS << '"';
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36 for (const char *B = Name.begin(), *E = Name.end(); B < E; ++B) {
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37 if (*B == '"') // Unquoted "
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38 OS << "\\\"";
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39 else if (*B != '\\') // Neither " or backslash
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40 OS << *B;
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41 else if (B + 1 == E) // Trailing backslash
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42 OS << "\\\\";
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43 else {
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44 OS << B[0] << B[1]; // Quoted character
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45 ++B;
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46 }
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47 }
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48 OS << '"';
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49 }
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50
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51 void MCSectionWasm::PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
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52 raw_ostream &OS,
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53 const MCExpr *Subsection) const {
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54
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55 if (ShouldOmitSectionDirective(SectionName, MAI)) {
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56 OS << '\t' << getSectionName();
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57 if (Subsection) {
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58 OS << '\t';
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59 Subsection->print(OS, &MAI);
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60 }
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61 OS << '\n';
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62 return;
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63 }
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64
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65 OS << "\t.section\t";
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66 printName(OS, getSectionName());
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67 OS << ",\"";
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68
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69 // TODO: Print section flags.
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70
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71 OS << '"';
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72
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73 OS << ',';
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74
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75 // If comment string is '@', e.g. as on ARM - use '%' instead
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76 if (MAI.getCommentString()[0] == '@')
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77 OS << '%';
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78 else
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79 OS << '@';
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80
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81 // TODO: Print section type.
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82
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83 if (isUnique())
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84 OS << ",unique," << UniqueID;
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85
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86 OS << '\n';
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87
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88 if (Subsection) {
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89 OS << "\t.subsection\t";
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90 Subsection->print(OS, &MAI);
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91 OS << '\n';
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92 }
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93 }
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94
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95 bool MCSectionWasm::UseCodeAlign() const { return false; }
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96
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97 bool MCSectionWasm::isVirtualSection() const { return false; }
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